Package com.mckoi.database.interpret

Class Planner.PlanTableSource

java.lang.Object

com.mckoi.database.interpret.Planner.PlanTableSource

Enclosing class:

Planner

private static class Planner.PlanTableSource
extends java.lang.Object

Represents a single table source being planned.

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	is_updated	Set to true when this source has been updated from when it was constructed or copied.
(package private) int	left_join_type
(package private) Expression	left_on_expr
(package private) Planner.PlanTableSource	left_plan	How this plan is naturally joined to other plans in the source.
private QueryPlanNode	plan	The Plan for this table source.
(package private) int	right_join_type
(package private) Expression	right_on_expr
(package private) Planner.PlanTableSource	right_plan	How this plan is naturally joined to other plans in the source.
private java.lang.String[]	unique_names	The list of unique key names of the tables in this plan.
private Variable[]	var_list	The list of fully qualified Variable objects that are accessable within this plan.

Constructor Summary

Constructors

Constructor	Description
PlanTableSource(QueryPlanNode plan, Variable[] var_list, java.lang.String[] table_unique_names)	Constructor.

Method Summary

Modifier and Type	Method	Description
boolean	containsUniqueKey(java.lang.String name)	Returns true if this table source contains the unique table name reference.
boolean	containsVariable(Variable v)	Returns true if this table source contains the variable reference.
Planner.PlanTableSource	copy()	Makes a copy of this table source.
QueryPlanNode	getPlan()	Returns the plan for this table source.
boolean	isUpdated()	Returns true if the planner was updated.
(package private) void	setJoinInfoMergedBetween(Planner.PlanTableSource left, Planner.PlanTableSource right)	This is called when two plans are merged together to set up the left and right join information for the new plan.
(package private) void	setLeftJoinInfo(Planner.PlanTableSource left_plan, int join_type, Expression on_expr)	Sets the left join information for this plan.
(package private) void	setRightJoinInfo(Planner.PlanTableSource right_plan, int join_type, Expression on_expr)	Sets the right join information for this plan.
void	setUpdated()	Sets the updated flag.
void	updatePlan(QueryPlanNode node)	Updates the plan.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

plan

private QueryPlanNode plan

The Plan for this table source.

var_list

private final Variable[] var_list

The list of fully qualified Variable objects that are accessable within this plan.

unique_names

private final java.lang.String[] unique_names

The list of unique key names of the tables in this plan.

is_updated

private boolean is_updated

Set to true when this source has been updated from when it was constructed or copied.

left_plan

Planner.PlanTableSource left_plan

How this plan is naturally joined to other plans in the source. A plan either has no dependance, a left or a right dependance, or a left and right dependance.

right_plan

Planner.PlanTableSource right_plan

How this plan is naturally joined to other plans in the source. A plan either has no dependance, a left or a right dependance, or a left and right dependance.

left_join_type

int left_join_type

right_join_type

int right_join_type

left_on_expr

Expression left_on_expr

right_on_expr

Expression right_on_expr

Constructor Detail

PlanTableSource

public PlanTableSource(QueryPlanNode plan,
                       Variable[] var_list,
                       java.lang.String[] table_unique_names)

Constructor.

Method Detail

setLeftJoinInfo

void setLeftJoinInfo(Planner.PlanTableSource left_plan,
                     int join_type,
                     Expression on_expr)

Sets the left join information for this plan.

setRightJoinInfo

void setRightJoinInfo(Planner.PlanTableSource right_plan,
                      int join_type,
                      Expression on_expr)

Sets the right join information for this plan.

setJoinInfoMergedBetween

void setJoinInfoMergedBetween(Planner.PlanTableSource left,
                              Planner.PlanTableSource right)

This is called when two plans are merged together to set up the left and right join information for the new plan. This sets the left join info from the left plan and the right join info from the right plan.

containsVariable

public boolean containsVariable(Variable v)

Returns true if this table source contains the variable reference.

containsUniqueKey

public boolean containsUniqueKey(java.lang.String name)

Returns true if this table source contains the unique table name reference.

setUpdated

public void setUpdated()

Sets the updated flag.

updatePlan

public void updatePlan(QueryPlanNode node)

Updates the plan.

getPlan

public QueryPlanNode getPlan()

Returns the plan for this table source.

isUpdated

public boolean isUpdated()

Returns true if the planner was updated.

copy

public Planner.PlanTableSource copy()

Makes a copy of this table source.